How to make row number in local member dynamic

I have create multiple local member and the formula I the local member is such as

=SUM(row11+row14+row16)

then I add another couple of row before row 11, now the formula should be:

=SUM(row13+row16+row18)

anybody know is there a way how to make the formula in the local member dynamic, which means that if I add rows of drop rows, the formula in local member will automatically change?